Drill-jig



H. J. HAUSER.

DRILL JIG.

APPLICATION FILED Nov. 27. Isls.

Patented' Feb. 3,1920.

JNVENTOR. f/enry ./T Hauser ATTORNEY.

WTNESSES:

@Im /o @ma miran' s'rarns PATENT oFFIoE.

HENRY J'. HAUSEB, OF CHICAGO,

- DRILL-nq.

1,329,970 l Specification ot Letters IPatent. 'i iPavaitllte-d Fel). 3,1920. I Appunti@ and Novembera?, 191s. serial 1ra-264,379. i To all whomit may concern: j i i with the holes and a latch 10 engagesthere.

Be a known that I, HENRY J. Hmm@ Illinois, have invented certain new anduseful Improvements in Drill-Jigs, of which the following isaspecification.

This invention relates to drill jigs used A for the purpose of holdingstock while it is.l being drilled. It is particularly adapted for roundwork, and embodies a clamp byv means of which the work is engaged, agage bar to set the work to scale according to t e place or places wherethe h oles are to be drilled, and auide for the drill, comprising a diskwhic can be set to register drills of different sizes with the work. Thedevice also includes an'ejectorpin to dislodge the work from the clam lv The invention is illustrated in the accompanying drawings lin whichFigure 1 is a top plan of the jig. Fig. 2 is a side elevation of thesame. Fig. 3 isa cross-section on the line A--A through the body and theline B-B through the clamp, of Fi 1. Fig. 4 is a section on the line C-of Fi 1. a

eferring speciicallv to the drawings, 1 indicates a block or body havinga` groove or channel extending lengthwise through the.

same, and a rectangular cross slot extendin through the same near oneendrthereof.

fixed jaw 4 is screwed tothe block and cooperates with a movable jaw 3which sets in the groove referred to. These jaws have V-faccs to gripround work, and the movable jaw is advanced by means of a wedge whichslides in the cross slot, with its inclined face in contact with theinclined under-surface of the jaw 3. The wedge 2 is adjusted by a screw18 and nut 13, the latter bearing against the side plate 12'fixed to theside of the block. The work is indicated at 21 and as shown in place,it-is gripped by the jaws with its inner end projecting under the openinin the top of the block through which t e drill D operates.

On the top of the body is a disk 5 which turns on a clrcular block 6 andis provided with a series of holes of various sizes for guiding thedrill.` The block or piece 6 bridges the longitudinal groove or channel`in the block 1 and is secured thereto by screws indicated at 26. Thedisk 5 is notched on the edge as indicated at 23, to correspond in linewith each other.

with to lock' the'disk in position and center c1t1zen of the UnitedStates, resldmg at Ch1- the selected hole with the stock-t0 be drilled.cago, 1n the'county of Cook and State of\`This disk mayibe clamped atadjustment by pressed to 'engagement by a spring 11; 2O is an index markon `the jaw 4, central in Arelation to the V-clam for the purpose 'oflocating `any line p aced on the stock 21' when it is desired to drilltwov or more holesj 14 is a sliding gage or scale bar which a.'-'dicates the distance from the end ofthe stock being drilled to thecentersof the hole,

and this scale is clamped in position bythe clamp piece 1.5 and screw16. The scalejbar extends under the a bur cause'it to stick.

In use, the index bar 14 is set to proper distance and the stock isinserted between the jaws where it will stop against the head 25. Thedisk 5 is then adjusted toA bring l `the proper sized holein the centerposition,

and latched by latch 10, the stock being clamped by operation of the nut13 and the actlon of the wedge 2 against the movable jaw 3. lThe drillmay then be advanced through the selected guide hole to drill the holeinthe stock, and after the drill is retracted, the stock may, ifnecessary, be ejected by the push rod 17 The series of graduated guideholes in the diskpermits any de sired size to be brought to the drillingposition without the use of any loose pieces such as pins or plugs thatare easily misplaced c guide disk',l and v`on its under s1de has clips24 which carry a rod 17' or lost. The dlsk may be readily removed l byloosening the nut 9 and removing the slotted washer 7 when the disk 5vmay be lifted off and another disk substituted fitting the other sizesand guide holes. It will be noticed that the hole in the disk '5 islarger uide hole than is possible where the .indexlng is done at a pointinside the guide holes.

- The combined scale bar andvpush rod act yas a gage for the distance ofthe center ofthe hole from the end of the stock and indicates thedistance on the scale. The push rod aids in removing pieces afterdrillin and is particularly desirable in drilling s ort. lengths ofstoel: which do not project beyond the end of the block. The lclampprovides a rigid support for the stock directly beneath the drill, andit may be tightened without the use of any tools such as a wrench orscrew driver. Other features of advantage ,f will be apparent to thoseskilled in the art.

2. A drill jig comprisinga block provided with'a channel therein, a.clamp at one end of said channel, a sliding gage bar extending alonwithin said channel, a bridge piece extending across the channel andconfining the gage bar therein, and a rotary disk mounted on the bridgepiece and extending across the said channel'above the age bar andprovided with guide holes or a drill.

.3. A drill jig comprising a block provided with a clamp forthe work, adrill guide on the block, a scale bar mounted on the block, andadjustable with respect to the guide, and a ush rod carried by the scalebar and sli able with respect thereto and adapted to eject the work fromthe clam v In testimon whereof, I atliir my signature lin presence o twowitnesses.

HENRY J. HAUSER.

